Tidy the default config file.
Add start and end time to vacation as well as date.
Make the checkboxes work (save/restore).
Fix some other save/restore issues.
Add model get/set functions and storage for
send_from and addressed_to data.
Implement these in the system and save/restore.
Also fix typo.
Fix time select in form. Remove pointless tmp variables.
Use the jquery-ui-multiselect-widget for addressed_to
Merge pull request #4 from gms-chris/master

Finish of initial work on plugin